GE Transport Pro, Service Manual

Page: 49 / 110

Revision A Transport Pro 6-3
2012659-042
Troubleshooting: Problems
b. Measure the resistance between the two pins:
‹
If it is between 6 and 8 ohms, replace the main processor FRU.
‹
If not between 6 and 8 ohms, replace the speaker FRU.
Alarms Light
1. Check alarm light cable and cable connection integrity.
2. If the cable is bad, replace alarm light FRU.
3. Check the alarm light circuit board.
a. (No light) If the jumper JP1 is missing, replace the jumper.
b. (Dim) Check the alarm light circuit board for LEDs that are not
lit. If not lit, replace the alarm light FRU.
c. (Always on) With the alarm light cable disconnected, check for
shorts between pins 1 and 3 and pins 3 and 2.
‹
If shorted, replace the alarm light FRU.
‹
If not shorted, proceed to next step.
4. Unplug the alarm light circuit board and check resistance on main
processor board from J16 pin 1 to ground (red) and from J16 pin 3 to
ground (yellow).
‹
If resistance is less than 10k ohms, replace the main processor
FRU.
‹
If equal to or greater than 10k ohms, replace the alarm light
FRU.
Display Blank
Battery Powered
1. If the control panel lights are off, check the battery. See “Battery
Function Test” on page 9-12. Replace or recharge as necessary.
2. If the control panel lights are on, check the cable connections
between the inverter and display and the cable connection between
the main processor and inverter.
3. If the connections are ok, replace main processor FRU.
External Power
1. If the control panel lights are off, check if the power supply LED is
illuminated.
a. If the power supply LED is on, check the connection to monitor.
b. If the power supply LED is off, check the AC power cord
connection.
‹
If all connections are good, replace the power supply.
‹
If problem persists, replace the main processor FRU.